Ocean spray grows naturally in the western parts of the USA and Canada. Here in Finland it grows best in warmth and sunshine, on moist but not wet soils, protected from spring frosts. At Mustila light conifer forest and fairly nutrient-poor stony soil have proved suitable. The roots are close to the surface so the soil must not be allowed to become too dry.
California provenances are unlikely to be hardy in Finland so seed should be collected in the most continental parts of its range, such as Montana or inland areas of British Columbia.